Troubleshooting
Greater Celandine problems — and how to fix them
Greater Celandine (Chelidonium majus) is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Invasive self-seeding
Greater Celandine seeds prolifically and can spread aggressively, becoming weedy particularly in disturbed or waste ground. Deadhead plants before seed capsules split to limit spread. In some US states it is considered an introduced weed; check local guidance before establishing in wild gardens.
Powdery mildew
Dry, overcrowded conditions can lead to powdery mildew on foliage in late summer. Improve air circulation by thinning plants. Water at the base rather than overhead. In most cases, affected foliage can simply be cut back; the plant typically regrows clean foliage in autumn.
Contact dermatitis from sap
The bright orange-yellow latex sap is a strong irritant that causes skin staining and dermatitis in sensitive individuals. Always wear gloves when cutting, dividing, or removing plants. Wash hands thoroughly after any contact. Keep sap away from eyes and mucous membranes.
Prevent greater celandine problems before they start
Most greater celandine issues are care-mismatch, not bad luck. Dial in the basics:
Greater Celandine problems — FAQ
Why is my greater celandine invasive self-seeding?
Greater Celandine seeds prolifically and can spread aggressively, becoming weedy particularly in disturbed or waste ground. Deadhead plants before seed capsules split to limit spread. In some US states it is considered an introduced weed; check local guidance before establishing in wild gardens.
Why is my greater celandine powdery mildew?
Dry, overcrowded conditions can lead to powdery mildew on foliage in late summer. Improve air circulation by thinning plants. Water at the base rather than overhead. In most cases, affected foliage can simply be cut back; the plant typically regrows clean foliage in autumn.
Why is my greater celandine contact dermatitis from sap?
The bright orange-yellow latex sap is a strong irritant that causes skin staining and dermatitis in sensitive individuals. Always wear gloves when cutting, dividing, or removing plants. Wash hands thoroughly after any contact. Keep sap away from eyes and mucous membranes.